No problem, we've got 1788 and 7915 to multiply
1788 × 7915 = 7915 × (1788)
+ 7915 × 8 that is equal 63320
+ 7915 × 80 which equals 633200
+ 7915 × 700 that equals 5540500
+ 7915 × 1000 that results in 7915000

= 14152020
